11111...11111 (3269-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

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A modified Palindromic Wing Number (modified because it has three digits in the center that differ from the rest instead of just one) that is a Fermat and Lucas PRP. [Earls]

Submitted: 2004-10-14 19:29:06; Last Modified: 2008-01-30 17:28:00.